***digging foundations for a single storey extension however dont want to go deeper than those of my house.?
Question:hi all please help.im asking again thanks for all that answered before.im building a single storey extension however next door want a party wall agreement as i might need to dig deeper than there house foundations according to the party wall agreement if i dig my founadtions deeper than theres i will need to go through the process...my house foundations are.5 bricks down from ground level and than a foot and half foundation.however the local council want me to dig a metre for a single storey foundation...how can i avoid digging below next door foundation level as the soil is quite tuff were i live...
Answers:
You need to get approval from the planning department of your local council , Building Regulations inspections are required even on an extension that does not require planning pemission. If you call the building inspector out to exam your ground works he will advise you about nescassary excavation depth, you don't always have to go 1m deep it all depends on the type of ground sometimes if you are on solid
shale or rock there would be little point in going too deep but on the other hand if you are on clay or sand you could be required to go well over 1m .
For a single storey extension you will need to go down at least ONE METER - if not more - tough soil or not - sorry dude - no way around it if it is to be a brick built construction.
The council are right to advise you of at least one meter BUT they could also re-visit and tell you to dig deeper -
try consulting a structural engineer, ask him if a post tension slab would work for your local building codes
c jamand=ok
hi
depending on location
mostly they will ask you dig below the frost line
some place frost are 4 ft deep
If you don't want to dig a trench 1.0 metre deep you could ask the Buiding Inspector to advise you on a beam and pad system. You will need to be build two pad foundations, one at each end of the wall and each will have to extend down at least 1.0metre. Then place a steel beam across to support the new wall. The beam will need to be cased in concrete. You will need a strutural engineer to design the sizes. This might well prove an easier and cheeper option.
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